Finding the Fourth Proportional to 12,906.48, 17,810.16 and 7,242

Step by Step Solution

1. Step 1: Write the proportion equation
   12,906.48 : 17,810.16 = 7,242 : x
2. Step 2: Convert to fraction form
   12,906.48/17,810.16 = 7,242/x
3. Step 3: Cross multiply
   12,906.48x = 17,810.16 × 7,242
4. Step 4: Simplify right side
   12,906.48x = 128,981,178.72
5. Step 5: Solve for x
   x = 128,981,178.72/12,906.48
6. Step 6: Final answer
   x = 9,993.52